Fibre orientation distribution in short fibre reinforced plastics

A force-directed algorithm was developed to create representative geometrical models of fibre distributions in directed carbon fibre preforms. Local permeability values were calculated for the preform models depending on the local fibre orientation, distribution and volume fraction. The effect of binder content was incorporated by adjusting the principal permeability values of the meso-scale discontinuous fibre bundles, using corresponding experimental data obtained for unidirectional non-crimp fabrics. The model provides an upper boundary for the permeability of directed carbon fibre preform architectures, where predictions are within one standard deviation of the experimental mean for all architectures studied.

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Robust determination of the fibre orientation distribution in diffusion MRI: Non-negativity constrained super-resolved spherical deconvolution

NeuroImage ◽

10.1016/j.neuroimage.2007.02.016 ◽

2007 ◽

Vol 35 (4) ◽

pp. 1459-1472 ◽

Cited By ~ 1112

Author(s):

J-Donald Tournier ◽

Fernando Calamante ◽

Alan Connelly

Keyword(s):

Diffusion Mri ◽

Fibre Orientation ◽

Orientation Distribution ◽

Spherical Deconvolution ◽

Fibre Orientation Distribution

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Modeling Bending Rigidity of Nonwovens with 2D Structures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.156-157.387 ◽

2010 ◽

Vol 156-157 ◽

pp. 387-391

Author(s):

Hua Wu Liu ◽

Zhi Gang Chen ◽

Ping Xu

Keyword(s):

Theoretical Model ◽

Fibre Orientation ◽

Orientation Distribution ◽

Single Fibre ◽

Original Position ◽

Dimensional Structure ◽

Two Dimensional ◽

Bending Rigidity ◽

Bending Behaviour ◽

Fibre Orientation Distribution

A theoretical model was developed to describe the bending behaviour and property of nonwovens with two-dimensional structure. The bending and tensional behaviours of single fibre with and without slippage in a bent fabric were analyzed. The method determining the neutral plane of bent nonwovens and the bending rigidity of fabrics with general two-dimensional structure were developed, incorporating fibre orientation distribution, number of fibres, fibre original position before bending and the Poisson’s ratio of the fabric. The analyses also give the fibre orientations that lead to the maximum and minimum contributions to the bending rigidity of the nonwovens in laminate and sandwich structures

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Microstructural analysis of non-woven fabrics using scanning electron microscopy and image processing. Part 2: Application to hydroentangled fabrics

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/146442070221600401 ◽

2002 ◽

Vol 216 (4) ◽

pp. 211-218 ◽

Cited By ~ 6

Author(s):

E Ghassemieh ◽

M Acar ◽

H K Versteeg

Keyword(s):

Fibre Orientation ◽

Microstructural Analysis ◽

Length Distribution ◽

Fibre Length ◽

Orientation Distribution ◽

Woven Fabrics ◽

Analysis Techniques ◽

Image Analysis Techniques ◽

Degree Of Entanglement ◽

Fibre Orientation Distribution

The image analysis techniques developed in Part 1 to study microstructural changes in non-woven fabrics are applied to measure the fibre orientation distribution and fibre length distribution of hydroentangled fabrics. The results are supported by strength and modulus measurements using samples from the same fabrics. It is shown that the techniques developed can successfully be used to assess the degree of entanglement of hydroentangled fabrics regardless of their thickness.

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Fibre orientation measurements near a headbox wall

Nordic Pulp & Paper Research Journal ◽

10.3183/npprj-2010-25-02-p204-212 ◽

2010 ◽

Vol 25 (2) ◽

pp. 204-212 ◽

Cited By ~ 6

Author(s):

Allan Carlsson ◽

L. Daniel Söderberg ◽

Fredrik Lundell

Keyword(s):

Fibre Orientation ◽

Orientation Distribution ◽

Laboratory Scale ◽

Experimental Results ◽

Dilute Suspensions ◽

Steerable Filter ◽

Fibre Orientation Distribution

Abstract Experimental results on the fibre orientation in a laboratory scale headbox are reported. Images containing fibres in approximately 1 mm thick slices parallel to the wall were captured at different wall distances. A steerable filter was used to determine the orientation of bleached and unbeaten birch fibres, suspended in water, at different distances from one of the inclined walls of the headbox contraction. Due to optical limitations only dilute suspensions were studied. It is shown that the fibre orientation distribution varies with the distance from the wall. Sufficiently far upstream in the headbox a more anisotropic distribution is found closer to the wall.

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